Sarah Shahi might only have joined Person Of Interest towards the end of season two, but she's already been made a regular for the new episodes and, after speaking with her at Comic-Con, it seems that there might be plenty more to come.

Read on to find out what Sarah had to say about trust issues, Root revenge and whether there's any romance in Shaw's future...

Unsurprisingly, Sarah said that she is excited about becoming a regular on Person Of Interest. "Before being asked to be on the show, I hadn't really watched it," she confessed. "And now that I am on the show and I am watching it, I'm quite a fan myself! So the fact that I'm on the show and I get to say the things that I'm saying, shooting the guns that I'm shooting, beating people up almost every other day, it's really fun."

But Sarah admitted that she had an inkling she might be sticking around - Shaw's future was "definitely discussed from the very beginning". "They wanted to try her out for about four episodes and see if the audience responded, and thank God they did," she said.

On Shaw being Reese's equal...

Sarah thinks Shaw can definitely add something to the Reese-Finch dynamic... like being a woman! "I think she offers a set of abilities that they possibly don't have," she said. "First of all, the fact that she's a female - that's a very powerful resource to have. And she can go undercover in areas that Reese can't go." But that's not all - Sarah suggested that Shaw has "the same sort of abilities that Reese has" as well. "She is kind of his equal as far as her capabilities with weapons and fighting and language skills," she pointed out.

On Shaw failing to kill Root...

Yep, Sarah admitted that she was disappointed Shaw didn't go the whole way: "I wanted revenge!" But she also said that perhaps we should wait to see what's coming. "[Executive producer] Jonah [Nolan] said to me, 'No, you want to keep her alive so you can torture her'," she revealed. "And I was like, 'Alright, that makes sense'."

Sarah explained that she doesn't know "much" about what's coming up in season three, but she does know that we're going to be finding out more about Shaw's past. "I don't know if it's going to be done in a series of flashbacks or what they're going to do with her, but this is a character that they really enjoy writing for," she said. "She's a mix between Jason Bourne and Catwoman, kind of, and they're really writing to that. So I definitely know that we're going to get to see why she turned out to be the way she is."

On the hard part of playing Shaw...

"It's a lot of working out!" Sarah joked. "I could probably think of a hundred, million things I'd like to do instead." She explained that she boxes and worked out with a military adviser when she first joined the show. Plus, she tries to do the same things as Shaw! "I just got my motorcycle licence because Shaw rides, so I figured I might as well, too," she said. "I don't really like 'acting' - I like things to feel as natural as possible." So she also had a two week "boot camp" in weapons training, knife training and fighting. Basically, don't mess with Sarah.

On Shaw's trust issues...

Yeah, Shaw is "still working on" those. "I don't know if that's something that she ever will overcome, at least not any time soon on the show," Sarah said, but she's not entirely convinced that's a bad thing. "I think that's also part of her charm in a way, that guard she has," she explained. "She likes keeping herself on the outside. She feels comfortable there. At this point she is kind of a man without a country, and having her own nation just kind of turn against her, there is nowhere she can go. So she has no choice but to put a little bit of trust into these guys. She looks over her shoulder every second as it is, and to know that there's another person that could possibly be looking out for her safety is the best that she could do right now."

"I could only be so lucky!" Sarah grinned. But don't be too hopeful just yet. "The show doesn't really have a lot of romance," Sarah pointed out. "When I first came on the show, especially after coming from Fairly Legal and The L Word, I'm like, 'Do you guys have sex on the show? Do you guys kiss?' And they all kind of laughed. It's like no-one on this show really has those parts, those bits, those sexual bits." But you never know - maybe things could change! "I think they are going to do something with me in that regard," Sarah teased. "I don't know what." But if it was with Reese, surely Zoe would have something to say about that? "Yes, yes, yes!" Sarah laughed. "Which I'm sure would make for some interesting TV."

Person Of Interest returns with its third season on CBS on September 24.